Description

And all docstring of models.py after number 37 should be changed, they are:
tests/modeltests/user_commands/models.py should be 38
tests/modeltests/test_client/models.py should be 39
tests/modeltests/empty/models.py should be 40
tests/modeltests/select_related/models.py should be 41
tests/modeltests/serializers/models.py should be 42